Machine for inspecting films



June 1929- V A s. DWORSKY MACHINE FOR INSPECTING FILMS 3 Sheets-Sheet Origifial Filed June 17, 1925 gwuenbo'c June 11, 1929. 5 DWORSKY 1,716,879

MACHINE FORINSPECTING FILMS Original Filed June 17, 1925 3 Sheets-Sheet 2 i r h I flnoentoz June 11, 1929. 5, DWQRSKY 1,716,879

MACHINE FOR INSPECTING FILMS Original Filed June 1'7, 1925 3 Sheets-Sheet 3 Patented June 11, 1929.

UNITED STATES ABRAHAM S. DWORSKY, OF NEW YORK, N. Y.

MACHINE FOR INSPECTIN G FILMS.

Application filed June 17, 1925, Serial No. 37,635. Renewed February 14, 1929.

One of the objects of my invention is to rewind a cinema film from one reel onto another in such manner as to adapt it to be inspected during the act of rewinding.

Another object of my invention is to stop the progress of the rewinding operation quickly and eflicie-ntly at any desired point.

Another object of my invention is to rewind a film from a receiving reel on which it has been fed during the exposure of the same, onto a paying reel so as to adapt the same-for another exposure.

Other objects of my invention will be readily apparent from reading this specification in association with the accompanying drawings in which Fig. 1 is a side view of my machine;

Fig. 2 is an end view looking at the same from right to left in Fig. 1;

Fig. 3 is a detailed view of the braking and crank mechanism;

Fig. 4 is a cross-section taken along the lines 44 of Fig. 3 looking in the'direction of the arrows; and

Fig. 5 is a detail view of the reel. shaft cap.

Referring now in detail to the drawings, 5 represents a hollow standard provided with a projecting pin 6 on which pin is mounted the reel 7. Rotatably mounted on the pint is a brake drum 8 which is also adapted to rotate with the reel 7. A brake band 9 is supported at one end on the standard 5 and extends over the brake drum 8, the other end of said brake band being adjustably connected to the link 10, the adjustment being controlled by the threads 11 on said link in cooperation with the nut 12.

At the other end of the machine is a standard 13 on which is mounted a projecting pin 14 which forms a shaft for the gear wheel 15, the cogs of which are in mesh with the cogs of the pinion 16 on the shaft 17 on which the receiving or driven reel 18 is mounted. The brake drum 19 is adapted to rotate with the pinion 16 and the reel 18 is also adapted to rotate therewith. A brake band 20 is provided to act upon the brake drum 19. One end of this brake band is supported in the standard 13 and the other end is adjustably connected to the link 21 through the thread and nut arrangement on one end of said link in the same manner as shown in the structure at the opposite end of the machine.

The brake rod 10 shown at the left in Fig. 1 is hingeably connected to the rod-22 by the bell-crank 23 which is pivoted at 24, said bellcrank being adapted to arcuate thereon. The brake rod 21 at the right of the machine is hingeably connected to the lever 25 which in turn is pivoted at 26 and adapted to arcuate on said pivot. The other end of this lever 25 is linked by a chain of hinged links 27 to the collar 28 adapted to-arcuate'on the shaft 14. On the shaft 14 is a projecting pin 29 and on the collar 28 are projecting lugs 30 adapted to be controlled by the pin 29 as hereinafter described. A crank 31 is mounted on the shaft 14 to manually turn said shaft and the mechanism operated thereby.

The shaft 14 is slideable in the bearings 32 and the gear wheel 15 is keyed to said shaft, as by a screw 33. The cog wheel 16 and the brake drum 19 are keyed to the shaft 17 as by the screws 34 and 35, respectively. A housing 36 forming part of the standard 13, is provided for the parts enclosed therein which housing embodies the bearings 32, 32'; and also constitutes bearings for the shaft 17.

The driven reel 18 is mounted on the shaft 17 so as to be rotated thereby and the reel 7 is mounted on the shaft 6 so as to permit the paying of the film therefrom when drawn by the driven reel 18. A retaining cap 37 is provided to fit over the end of the shaft 17 when the reel 18 is in position, to retain the said reel in its position on the said shaft. A similar retaining cap is provided to retain the reel 7 in its position on the shaft 6. The cap 37 is connected to the rod 38 by the link 39 and the cap retaining in position the reel 7 is connected to the said rod 38 by the link 40. These links 39 and 40 are keyed to the rod 38 so as to arcuate therewith. Also keyed to the said rod 38 is handle 41. This rod 38 is normally controlled by a spring 42 whose tendency is to so turn the rod 38 as to disconnect the retaining cap 37 from the shafts 17 and 6, respectively. When the film reels are in operative position in the machine, the handle 41 is drawn upward to the position shown in the drawings and is held against the spring tension by the tongue 43. This handle 41 is adaptable to sufficient lateral play to permit it to be brought around the end of the tongue 43 and placed in frontof the same so as to be held in position thereby.

In Fig. 5 is shown a detail of the cap 37. This cap is hollow as shown and is provided with an insert 37 having a recess 37 which recess is adapted to fit over the end of the shaft 17. An adjusting screw 37 is fitted through the cap 37 and controls the position of the insert 37 in said cap. It will be understood, of course, that the cap associated with the shaft 6 has the same construction. The purpose of this is to take up by adjustment any undesirable play between the reel and the cap and prevent the reel from falling out' of rotatable relation with its shaft.

A reel of film which is about to be inspected or rewound is mounted upon the shaft 6 and the outer end of the film is connected to the driven reel 18 in the usual way, which said reel is mounted on the shaft 17 so as to retaining caps in position over the ends of the respective shafts 17 and 6, thereby retaining the reels in position on said shafts.

The crank 31 being in the position shown in Fig. 4 is then revolved, turning the shaft 14-and the gear wheel 15 keyed thereto. This gear wheel intermeshes with the pinion 16 keyed to the shaft 17 which carries the reel 18 and revolves the same drawing the film at a rapid rate, The rate of movement of this film, however, may be controlled by the op er'ator from the crank 31.

' In inspecting moving picture films; the operator ordinarily has the film pass through his hands for the purpose of detecting defects bythe sense of feeling. Upon noting a defect in the film he draws the crank 31 to its outward position and with it the shaft 14 and the gear wheel 15 which is keyed thereto withdrawing the said gear wheel out of mesh with the pinion 16. Upon this sliding movement. of the shaft 14, the pin 29 at the end thereof is brought between two of the projecting lugs 30 on the collar 28 and the crank is given a reverse movement thereby bringing the pin 29 into contact with the lug in its path thereby arcuating the collar 28 l and through the chain links 27 drawing up the lever 25 and drawing down the brake band 20 onto the brake drum 19 and thus stopping or slowing, as desired. the movement of said brake drum and the shaft 16 upon which it is keyed, and consequently, the

reel 18 which is adapted to move with said shaft. Simultaneously with this operation the lever 45 which is integrally mounted on thclever 25 and forms a bell crank therewith,

is arcuated and moves the rod 22 with which it is pivoted, longitudinally so as to operate the bell-crank 23 and thereby draw down the brake lever 10 and with it the brake band 9 upon the brake drum 8 and thereby stop or slow as desired the shaft 6 and consequently, the reel 7 mounted thereon.

In order to adjust the brake bands in their relationship to the brake drums, the construction of the same is similar on both of the brake mechanisms shown. For this purpose, if it is desired to tighten the brakes, the nut 46 is screwed downward on the brake rod 10,

and the winged nut 12 is then screwed downward carrying with it the brake band 9. In case it is found that the brakes are too tight, the winged nut is screwed in an upward direction and thenthe nut 46 is also screwed upward, bringing with it the brake band 9.

I have described what I believe to be the best embodiment of my invention. I do not wish to be limited, however, in patent protection to the embodiment shown, but what I desire to cover by Letters Patent is set forth in the appended claims.

Claims: 7 l

1. In a machine for rewinding and inspecting moving picture films, apair of revolvable supports, a pair of reels on said supports, means for locking said reels on said supports embodying retaining caps adapted to fit over the said supports, a rock shaft, links mounted on said rock shaft and. adapted to lock'therewith, said links having mounted on theother end thereof the said retaining caps, and means mounted onsaid rock shaftadapted to control the same, and means for locking said mechanism in position to rotate the reels of said respective shafts, and means for rotating one 'of said supports and the reel carried thereby, the said driving reel being adapted to receive a strip film from the other reel, and means for simultaneously braking the rotation of said reels. V

2. The structure defined in claim 1 in V recessed inserts adapted to fit over the ends of the revolving supports and means for ad justing said inserts in said caps.

, 3. The structure defined in claim 1 in which the brake mechanism embodies a pair of. brake drums carried on said reel supports, a brake band cooperating with each of said brake drums, a plurality of links connecting said brake bands in such manner as to adapt them to operatesimultaneouslyupon their respective brake drums and means for operating said links. I

4. The structure defined in claim 1 in which the means for operating the brake mechanism embodies a slidable shaft, a crank adapted to rotate the same, a gear wheel on said shaft, a counter shaft, a cog wheel on said counter shaft adapted to intermesh with said gear wheel, a brake drum on said counter shaft, a collar rockably mounted on the aforesaid shaft provided with projecting lugs, a pin laterally projecting from said shaft and adapted to engage one of said lugs upon the sliding of said shaft and simultaneously disconnect the aforesaid gear wheel for the aforesaid cog wheel, brake bands adapted to 10 engage the aforesaid brake drums, and link and lever mechanism adapted to bring said brake hands into engagement with said brake drums upon the backlash of said crank when in Withdrawn position.

ABRAHAM S. DWORSKY.

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